A positively charged ball hangs from a long silk thread. Electric field at a certain point (at the same horizontal level of ball) due to the ball is E. If now put a postive test charge `q_(0)` at this point and measure `(F)/(q_(0))`, then E

Explanation

When we try to measure the electric field at point P then after placing the test
Charge at P it repels the source charge (suspended charge) and the measured value of electric field `E_("measured") = (F)/(q_(0))` will be less than the actual value `E_(act)` that we wanted to measure.